Paris Hilton stepped out at Sundance Film Festival showing off her assets but much to her dismay it wasn't her toned figure that caught onlookers' eyes.Dressed in a midnight blue be-jewelled mini-dress teamed with leather boots, the socialite revealed a pair of bony, knobbly knees at the event in Utah.Although keeping trim is the look favoured by young Hollywood bony knees will never be in style, and despite accessorising her look with a golden brown tan and an armful of chunky gold bangles, the heiress failed to impress fellow fashionistas. Unfortunately for poor Paris, her chic footwear only emphasised the fashion faux-pas.This is not the first social embarrassment the starlet has brought upon herself of late. She was recorded during an expletive-laden outburst in club LAX last week.After being paid to party there, the blonde bombshell grabbed the microphone to rally the crowd and proclaimed club Los Angeles LAX is "the best f***ing place to go" and that all the DJs "are rocking their f***ing b*lls off".Then, a clearly hyped up Paris declared she was ready to "f*** it, lick and beat it."Paris's intention to turn her back on hedonism after serving a jail sentence last year clearly didn't make it into the final cut of New Year's resolutions for 2008.